M y q u e s t i o n i s f r o m M a t r i c e s g r a d e 12 . . . n o l i n k s p l s . . . P r o v e t h a t t h e p r o d u c t o f t h e m a t r i c e s cos 2 θ cos θ sin θ sin θ cos θ sin 2 θ a n d cos 2 ϕ cos ϕ sin ϕ sin ϕ cos ϕ sin 2 ϕ i s a n u l l m a t r i x i f θ a n d ϕ d i f f e r b y o d d m u l t i p l e o f π 2 Share with your friends Share 0 Rambaboo Khatana answered this 0 View Full Answer